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Statamic CMS CVE-2026-64663

| EUVDEUVD-2026-54233 MEDIUM
Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') (CWE-470)
2026-08-06 https://github.com/statamic/cms GHSA-j2vp-f2pv-5rj4
6.5
CVSS 3.1 · Vendor: https://github.com/statamic/cms
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Severity by source

Vendor (https://github.com/statamic/cms) PRIMARY
6.5 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
vuln.today AI
6.5 MEDIUM

AC:H reflects the required non-default template configuration; PR:N confirmed by advisory; A:H for irreversible content/asset destruction; C:N as no disclosure impact described.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
4.0 AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (https://github.com/statamic/cms).

CVSS VectorVendor: https://github.com/statamic/cms

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High

Lifecycle Timeline

3
Patch available
Aug 06, 2026 - 23:03 EUVD
Source Code Evidence Fetched
Aug 06, 2026 - 20:06 vuln.today
Analysis Generated
Aug 06, 2026 - 20:06 vuln.today

DescriptionCVE.org

Impact

Manipulating user-supplied input incorporated into Antlers templates could result in the loss of content and assets.

Exploitation requires a site to have templates that pass untrusted input into affected areas. It does not require authentication.

Patches

This has been fixed in 5.74.1 and 6.24.0.

AnalysisAI

Unsafe method invocation via Antlers template resolution in Statamic CMS enables unauthenticated remote attackers to destroy content and stored assets on affected installations. Sites running statamic/cms below 5.74.1 or in the 6.x line below 6.24.0 are vulnerable when their templates incorporate user-supplied input into Antlers template resolution - a deployment pattern present on developer-facing or dynamic sites. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires the target Statamic site to have one or more Antlers templates that incorporate untrusted user-supplied input - such as HTTP request parameters, form fields, or URL segments - directly into Antlers template variable or method resolution without sanitization. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 3.1 vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H scores 6.5, reflecting a genuine tension between the network-reachable, unauthenticated attack surface (AV:N/PR:N) and the high-complexity precondition (AC:H) imposed by requiring templates that pass untrusted input. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation The primary fix is to upgrade statamic/cms to version 5.74.1 (for v5 users) or 6.24.0 (for v6 users) via Composer: run 'composer update statamic/cms' and confirm the installed version meets the fixed threshold. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-64663 vulnerability details – vuln.today

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